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Chapter 20. Using FrontPage 2002's Dynam... > DHTML and Web Page Modification

DHTML and Web Page Modification

You'll be familiar with Web pages whose elements change appearance in response to mouse movement or mouse clicks. Such effects are often achieved by the use of Dynamic HTML (DHTML), an important software technology—or collection of technologies—that helps you create pages whose structure, content, or appearance can be changed in response to user input.

Until DHTML, most such changes had to be made with custom programming at the server side of the Web connection, so that any change in a page required entire new version of the page to be downloaded to the user's machine (the client). If there were many such changes, the load on the server became very high and response times suffered. With DHTML, however, all the changes are made on the client machine (assuming a DHTML-capable browser is receiving the pages). Because no server round-trip time exists for page modification, the user gets faster results and the server breathes a sigh of relief. From the user's point of view the page changes its appearance and behavior in response to the mouse or keyboard. This enhanced capability to respond to users'input makes this development of HTML dynamic.


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